Belt-shifter.



Patented May 8, 1917.

Inventor S a E,

Attorney W OESTERLEIN BELT SHIFTER.

APL|CAT|0N men 05c 2a 1916 Witness: &

wILIJIAM onsrfiitnnm, or oINcINnA'rI, OHIO; nssrenoa To a r n ons rnnnnrn MACHINE COMPANY, or eincrimari, OHIO, A CORPORATION or 01110.,

Specification of Letters Patent.

Patented May a,- ieit.

Original application filed July 9, 1913, Serial No. 778,192. Divided and this application filed December 28, 1916. Serial No. 139,269.

To all whom it may concern:

Be it known that 1, WILLIAM Ons'rnnnnrn, a citizen of the United States, residing at Cincinnati, Hamilton county, Ohio, have invented certain new and useful Improvements in Belt-Shifters, of which the following is a specification, this application being a division of my application filed July 9, 1913, Serial No. 778,192.

This invention relates to a belt-shifter adapted for attachment to mechanism carrying a cone-pulley, the object of the beltshifter being to facilitate the shifting of the belt from one step to another step on the cone. The invention will be readily understood from the following description taken in connection with the accompanying drawing in which Figure 1 is a perspective View of the beltshifter, with the operating hand-wheel omitted in order to more perfectly expose other parts: and

Fig. 2 a vertical transverse section through the carriage, part of the section appearing in the plane of line a and another part in the plane of line b of Fig. 1.

In the drawing 1, indicates a pair of brackets adapted to be secured to the machine with which the belt shifter is to be associated such, for instance, as the bearing-standards of the arbor of a milling machine, or a lathe:

2, a horizontal guide-rod extending rigidly from one bracket to the other at the outer extremities of the brackets:

3, a similar guide-rod at the inner extremities of the brackets, it being understood that the guide-rods are a distance from each other in excess of the distance which the belt is to move to and from the axis of the cone-pulley in being moved from the smallest to the largest step of the cone-pulley:

4:, rack-teeth formed on guide-rod 3:

5, a carriage mounted to slide on the guide-rods 6, a vertical mortise through the carriage, between the guide-rods, the length of this mortise, in a direction parallel with the guide-rods being somewhat in excess of the width of the belt with which the apparatus is to deal, and the width of the mortise being in excess of the difference in radii of the extreme steps of-the cone-pulley:

7, the end walls of the mortise:

8, a bearing provided on the carriage, at one end of the mortise and transverse to the guide-rods and above the guide-rods:

9, a pinion-shaft journaled in the bearing and projecting from the front end of the bearing: i

10, a handwheel secured on the front end of the pinion-shaft and typifying means by which the shaft may be rotated: and

11, a pinion fast on the rear end of the shaft and engaging the rack-teeth of the rear guide-rod.

By turning shaft 9 the carriage may be traversed endwise of the guide-rods, and these guide-rods should be long enough to permit such endwise travel of the carriage as is appropriate to the length of the conepulley whose belt is to be shifted. The portion of the belt at the front of the conepulley is to run through the mortise of the carriage, and the end walls of the mortise are preferably slightly convexed, vertically, in order to avoid the presence of corners likely to do injury to the belt,

Assume the carriage to be at its extreme rightward position, and the belt to be running on the largest step of the cone-pulley. The belt will then occupy a front position in the mortise with its edges near the end walls of the mortise. If, now, the pinionshaft be turned, in direction against the sun, the carriage will be shifted to the left and the belt will be moved off of the large step of the cone-pulley and may be delivered in position to engage any other selected step of the pulley, and when the belt is engaging any step of the cone-pulley less in diameter than the largest step, the belt will take appropriate position farther inward in the mortise. While the belt is being shifted from one step to another it occupies a corresponding position widthwise of the mortise.

I claim A pair of brackets adapted to be secured to a frame-part supporting a cone-pulley, a pair 'of guide-rods extending from one bracket to the other and rigidly secured to them in position parallel with the axis of the cone-pulley with which the belt-shifter is to deal, rack'teeth provided upon one of said guide-rods, a carriage fitted to slide angles to the guide-rods, a pinion fast on Witnesses:

freely upon the guic1e-rods and provided end of the shaft for rotating the shaft and With a vertical mortise between the guidepinion, combined substantially as set forth.

rods a shaft journaled in the carriage at one end of the mortise therein and at right WILLIAM OESTERLEIN' one end of the shaft and engaging said rack- C. G. BROQKMAN, teeth, and means connected with the other CHAS. W. SCHILLING.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

